发明名称 |
Method and device for the manufacture of a tube from strip material |
摘要 |
<p>The method of making thin wall metal tubes involves cold forming a thin metal blank into an increasing curved section with the edges (4) closed and then welded together. The partially formed blank (3) is first twisted around a quarter turn and, prior to welding closed, is rotated back slightly. The claims also include a machine for carrying out the method.</p> |
申请公布号 |
EP0976466(A2) |
申请公布日期 |
2000.02.02 |
申请号 |
EP19990109817 |
申请日期 |
1999.05.19 |
申请人 |
DREISTERN-WERK MASCHINENBAU GMBH & CO. KG |
发明人 |
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分类号 |
B21C37/08;B21C37/083;B21D5/12;(IPC1-7):B21C37/08 |
主分类号 |
B21C37/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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